UNITED NATIONS - The UN chief told Syrian President Bashar Assad on Saturday that he was alarmed by the escalating violence in Syria and demanded that Assad stop deploying the military against civilians."In a phone conversation with President Assad of Syria today, the Secretary-General (Ban Ki-moon) expressed his strong concern and that of the international community at the mounting violence and death toll in Syria over the past days," the UN press office said in a statement.It added that Ban "urged the president to stop the use of military force against civilians immediately."